Advertising machine



- 1,612,850 c. BARLOW ADVERTISING MACHINE Jan. 4, 1927.

Pi}? Nov. 28, 1921 8 sheets-511; 2 4 l F A 28 .Z 7

In z/emfon Jan. 4, 1927.,

c. BARLOW ADVERTI SING MACHINE Filed Nov. 28, 1921 8 Sheets-Sheet 3 Fig.3.

Cl. BARLOW ADVERTISING MACHINE Jan. 4, 1927. 1, 12,850

Filed Nov. 28, 1921 8 Sheets-Shet 4 H ll llllllllllllll [DI/Enfor- 6 Bdf/ou/ Jan. 4 9 1 612 c. BARLOW ADVERTISING MACHINE Filed NOV. 28, 1921 8 Sheets-$heet 5 Jnemor. 6 -C. Ear/0w y F W Jan. 4, 927, 1,612,850

C. BARLOW ADVERTI 5 BIG MACHINE Filed Nov. 28, 1921 8 Sheets-Sheet 6 Jam 4, man ,850

c. HARLOW ADVERTISING MACHINE 7,;ts-Sheet 6 LU vzmtdw Filed Nov. 28,

Patented Jan. 4, 1927.

UNITED STATES PATENT OFFICE.

ADVERTISING MACHINE.

Application filed November 28, 1921, Serial No. 518,319, and in Australia December 6, 1920.

This invention relates to devices for automatically displaying series of written, printed or pictured advertisements or announcements effectively in succession in constantly recurring cycles and without attention as long as the driving force of their mechanism is maintained.

The object of this invention is to provide an improved method of displaying a series )f written printed or pictured advertisements in succession and in recurring cycles with new and improved mechanism to effect this) result.

This invention comprises essentially a long wide band hereinafter referred to as a screen with sufficientlength and width for the size and number of advertisements to be displayed and of any material and surface suitable for writing printing drawing painting or otherwise picturing advertisements thereon with a suitable surface also for clearly displaying the said advertisements by day or artificial light from in front or translucent for effective lighting from behind, or both, and of suflicient flexibility thinness strength and durability for winding continuously on and off the rollers to which it is secured at each of its ends, the said screen mounted on these and other rollers all contained and carried in a sufficiently weather and dirt proof case preferably glass fronted and sufficiently rigid and strong and large enough to carry and contain the said screen and rollers and the lamps nece sary for night display and all mechanism needed for winding the screen on and off and over the rollers with proper stoppages and timing from one end roller to the other and then returning it with the same stoppages and timing continuously for as long as the driving force in the mechanism is maintained; and comprises and includes all mechanism necessary for starting and stop ping the movement of the screen at the right times and in the right places and for reversing the direction of motion at the right time required for the return cycle and for regulating and varying any auxiliary display designed to attract the attention and retain the interest of the public to whom the advertisements are displayed, all as hereinafter described and ascertained in detail and pic tured in the accompanying drawings and covering the following particular conditlOIlSI- 7 1.. The display of each advertisement while stationary shall be clear, well lit and arresting and with attention drawn thereto,

and for an effective interval.

2. The change to the next consecutive advertisement shall take place effectively as to time and motion and appearance and shall be accompanied by such variation of the auxiliary display as may be desirable to hold the public attention and contribute to the general effect. I

3. These events shall alternate continuously throughout the series of advertisements on the screen without variation in the time and movement.

4-. The series of advertisements whenever finished shall always, automatically repeat itself in reverse order with the last advertisement as a turning point to form a continuous unceasing display of advertisements as long as the power actuating mechanism is retained.

Referring to the accompanying 8 sheets of drawings illustrating this improved device for displaying advertisements Fig. 1 exhibits in outline the invention as it appears seen from in front tothe spectators it is to interest with the advertisement display, and shows positions for lamps to illuminate the screen from behind at night and for the auxiliary display enhancing the effect.

Fig. 2 is a front view with the front and screen removed to show in outline the whole general arrangement.

Fig. 3 and Fig. 4 are opposite side views in outline, each as seen from inside, Fig. 3 to show particularly the gear from the motor to the positioning barrel and Fig. 4 the gear from the positioning barrel to the winding rollers.

Fig. 5 is the side elevation and Fig. 6 the front view of a general arrangement of a reduction gear suitable between the motor and a driving sprocket in the first chain.

Fig. 7 exhibits details of mechanism operat-ing a positioning barrel essential in this invention and of the contrivance effecting periodic reversals of the drive, in a side view from inside the case.

Fig. 8 shows the reversing mechanism from in front. In Fig. 9 the reversing mechanism is shown in plan, leaving out the change-over switch to exhibit the chain positioning spring underneath.

Fig. 10 is a front sectional elevation to show details of one end of the positioning barrel.

Fig. 10 is a similar view of the other end of the positioning barrel.

Fig. 11 is a sice view from inside the easing exhibiting details of the chain drive to the winding rollersand of the timing device for varying the auxiliary display.

Fig. 12 is the front view of the adjustable pedestal carrying the sprocket wheel for deflecting and taking up in the chain drive to the winding rollers.

F 13 is a front sectional elevation of one of the winding rollers showing in detail the bearings and the friction clutch whereby the roller is alternately lriven or retained.

Fig. 1a is a vertical. sectional view taken on line 111et of 13. Fig. is a similar view taken on lii e 15-15 of Fig. 13.

The casing 14: (Figs. 1 to a is practicable as a wide high shallow box securely set up in a prominent position for display, substantial as to the SlC-BS and back, carrying and enclosing all the parts of the invention enclosed in front with a glass panelled door which opens to inspect and to gain access to all these parts.

The screen 15 on which the advertisement or announcements are depicted is attached at each end to and wound upon flanged rollers 16 and l? favorably proportioned in diameter and flange. It carried over a positionin barrel 18 with teeth 19 to engage in perforations 20 running the length of the screen along the margin on each side (Fig. l).

The two w rollers and the positioning barrel (F 2 3, l) are mounted on bearings set in the s' walls of the casing 1%, the former in bearings 21, the latter in bearings 22 and 23 (see Fig. 10), and the three are all power driven by means hereinafter described in detail, the positioning barrel 18 from the motor, and the winding rollers 16 and 17, alternatel from the positioning barrel, each roller with ratchet wheels and friction gear hereinafter described, to keep the screen 15 always taut even with the progressive variations in the winding and unwinding diameters of the rolls.

Another roller 2 f, free, of small diameter, omitted in 2, o facilitate illustration in bearings of the sit-.e walls of the casing l l, or (less fireferably) a fixture, is provided to oppose the tendency in the screen, in engage ment with the positioning teeth 19, to be drawn inward when leaving the barrel 18 on that side of it.

. Means of attaching the screen 15 at its ends to the rollers 16 and 17 are by any recognized practical method, providing points of attachment on the rollers and on the screen and shaping the ends of the screen to any convenient form for that purpose.

Mounted on a solid shelf 25 well secured to the side and back of the casing in the right position is (preferably) a suitable reversible electric motor 26 (Fig. 2).

Two plates 27, one of which is screwed firmly against the side wall of the casing la and carries three shouldered pillars 28 to space the plates and support the other plate in position, constitute a solid frame for a train of spur wheels for a speed reduction gear for a pinion on the motor shaft to drive a sprocket wheel 29 on the last shaft to engage and drive an endless sprocket chain 30.

The middle shaft 31 in this train, giving the speed required for the purpose, is projected to carry a certain roller 90 hereinafter referred to and for a purpose hereinafter described and ascertained.

The endless sprocket chain is carried shoulder 33 central about the bearing 22,

the other two running on shoulders eccentric on flanged pedestals 3% (Fig. 9) fitting over and in circular holes correctl placed in the wall of the enclosing casing 14 to be turned in these holes for adjustment purposes and clamped in set positions with nuts and washers outside the casng as shown.

The positioning barrel 18 (Figs. 10 and 10) has essentially a cylindrical surface and the teeth 19 proportioned and pitched and in line with the perforations in the screen 15 so that with the separate advertisments on the said screen exactly placed an exact amount of turning of the barrel, to which also the diameter of the barrel is exactly proportioned, serves always to bring the next consecutive advertisement into exactly the position previously occupied by the previous advertisement on view.

This barrel is practicable with solid ends drilled for the shaft, these ends tight and secured in the ends of a cylinder of thin sheet 1. etal, and sprocket toothed rims centered on and fastened to these ends to furnish th essential teeth 19 to engage the screen. Central on and fastened to one of these ends is a flanged collar 35 to be pinned or therwise secured to the barrel shaft and by which the barrel can be driven as fol lows The positioning barrel 18 has also the sprocket wheel 36 fixed on the flanged collar 35 by which it is driv n at the proper time and exactly by certain rollers 37 carried on lugs on the driving chain 30, (Fig.

Ill)

- said cams are lifted. The base plate The positioning barrel is centered and held and carried on the shaft 38, as by pinning through the collar 85, (Fig. 10), and the said shaft is carried between the bearings 22 and 23 hereinbefore referred to. The sprocket wheel-89, designed and proportioned to transmit the drive through a chain to sprocket wheels 41 on the shafts of the winding rollers 16 and 17 (Figs. 11, 13), is pinned or otherwise fixed on the shaft 38. The sprocket wheel 86, the barrel 18 with the teeth 19, and the sprocket wheel 39 and the shaft 38 turn all together as one piece (Fig. 10).

The end of the shaft 38 in the bearing 22 is squared or slotted or otherwise adapted for the end of a winding handle suitably fashioned to engage to turn the positioning barrel in either direction.

For the bearing 22 for the positioning barrel 18 a base plate 42, screwed to the casing Wall insice in right position isbored to take the ends of the positioning barrel shaft 88. A boss on the base plate 42 provides for the shoulder bearing 83 hereinbefore referred to concentric with the shaft 88. The casing is bored in line with th. shaft to introduce a winding handle.

A circular segment 48 of definite'inside radius, fastened on the base plate 42 in the right position, forms an important guide over the rollers 87 in engagement with the sprocket wheel 86 (Fig. 7

Projections 44 from the base plate 42 carry pivots 45 for cams 46 designed and shaped to janib the rollers 87 for better engagement as they are leaving the sprocket wheel 36. The cams 46 carry springs 47 meeting lugs 48 on the base plate projections 44 when the 42 is also projected to carry a bar 49 for a guide for the chain 80 preserving the alignment of this chain with the rollers 37 engaging the sprocket wheel 36. V

For the bearing 23 (Figs. 10, 10 and 11), for the positioning of barrel 18, a plate 50 has a boss to fit a hole correctly positioned in the Wall of the casing 14 to which the plate is fastened also with screws. The plate 50 has also an extension with a small boss, 51., provided for a purpose hereinafter referred The large boss is drilled and tapped for a large screw 52 (Fig. 10 with the head outside the casing 14 and a lock-nut 53 provided.

Projecting inside sufficiently the screw 52 is shouldered and turned to meet and fit and carry the positioning barrel shaft 68 at that end faced and drilled for the purpose as shown in the drawings.

Finally the large boss on the plate 50 pro jected inside thecase provides for a shoulder bearing 54 concentric with the screw 52 to the shaped piece 58 advancing plate is made wide enough and sui carry a spur wheel hereinafter described in detail.

One of the pedestals 34 already referred to is extended sufficiently to carry, centrally mounted, a flanged pulley 55 (Fig. 9) with a retaining screw 56 to hold it. The other pedestal extended (Figs. 8, 9), provides a flat face and in this face, central on th pedestal, is a long stud 57 projecting through a slot in a shaped piece 58 with a tight nut 59 on this stud to hold this piece firmly in a set position against the flat face of the pedestal.

Over the pulley 55 and the shaped piece 58 (Fig. 7) is carried a short endless sprocket chain 60 with a number of links one less than there are advertisements in the series on the screen and this chain has a pin or lug 61 projecting to engage a change over switch 62 for reversing the motor 26, which switch is mounted off the wall of the casing in a suitable position.

With the holes for the screws or bolt-s attaching the base of the switch 62 to the casing elongated as shown in the drawing the striking distance from the centre of the switch for the striking pin on the chain 60 can be adjusted.

In the loop of the chain 60 where there is length for the number of links necessary is the spring 63 projected from the bracket 64 on the wall of the casing, coiled for resilience and shaped for right contact the chain 60, serving importantly to keep this chain taut and positioned.

The chain 60 is positioned just clear of the rollers 37011 the chain 30, so that one of them 37, made longer than the others, will engage the chain 60 at the bend about the chain 60 link by link in the direction of travel of the chain 30 at the time.

To make good this engagement there is a fixed guide 65 provided, on a plate 66 screwed to the back of the casing 14, which ticiently well fixed for a base for a bracket- 67 projecting and taking the end of the long stud 57 to hold this stud sufficiently to reinforce the pedestal with enough additional support for the shaped piece 58 when the engaging roller and the chain 60 come into hard engagement between it and the unyielding guide 65.

The piece 58, (Fig. 7), which is flanged to hold the chain 60 in alignment, is shaped specifically to allow smoothly over it in either direction but bending sharply for right engagement link by link by the long roller on the chain 30, this engagement made good by the guide 65, to suit which purpose it can be p ned exactly relatively to this guide by shifting it on and about the stud 57.

The roller 57 which is elongated to eniii-3 lit) the chain 60 to feed M gage the links of the chain 60 between the shaped piece 58 and the guide 65 is the end roller of the series when the several rollers 37 in the chain 30 are round about the driving sprocket wheel 29, (Fig. 7).

The chain 60 is the reversing piece in the mechanism.

The flanged winding rollers 16, 17 are tight and centered on shafts, 68 and 69 (Fig. 13) in line, projecting to carry in the bearings 21 hereinafter referred to.

F or each of the four bearings 21 for the winding rollers 16 and 17 there is a plate 70 with a boss to fit a hole correctly positioned in the side wall of the case 14 to which this plate is secured with screws.

The plate is drilled through the boss and tapped for a large screw 71 with the head outside the casing 14 and a lock nut 72 and the end of the screw projecting inside and shouldered and turned to meet and fit and carry the projecting end of one of the shafts 68 and 69 faced and drilled for the purpose, as shown on the drawings.

And bearings (two) not shown on the drawings are provided for the small diameter free roller 24 of the same kind as the bearings 21 but small to suit the purpose, with the roller 24 provided with projecting shafts at each end to take on the screws of these bearings in the same way.

The chain 40 transmitting drive from the positioning barrel to the winding rollers is caught up by a free sprocket wheel 73 mounted on a pedestal 74 (Figs. 11, 12) bolted to a plate 75 securely fastened to the back of the casing 14 with screws or bolts. the pedestal 74 having the two slotted holes in an elliptical flange as shown for studs in the plate 75 for adjustment of the position of the sprocket wheel 73 to serve the secondary purpose of a take up in the chain 40 in addition to the primary purpose of deflecting this chain about the sprocket wheel 41 of the roller 17 to turn it in the same direction as the other sprocket wheels in this chain and with a sufficient turn about it for good grip and proper drive.

Each of the sprocket wheels 41 driven by the chain 40 rides free on a collar with a wide flange 76 (Fig. 13) this collar keyed on one of the shafts 69 of the winding rollers 16 and 17 against a shoulder on this shaft, but with preferably a washer 77 between, the sprocket wheel running between this washer and the flange.

Another collar with a similar flange 78 is held fast on the shaft between another shoulder and a tight nut 79.

Between the two flanges 76 78 (see Fig. 13) are two ratchet toothed wheels 86 81, free onthe shaft, but with their bosses engaged dog-clutch fashion as at 80 so that these wheels turn together, and with a suit able helical spring 82 in sufiicient compression between them to make enough friction against the flanges 76 78 for the purposes hereinafter specified. And there can be friction washers between the rubbing surfaces as may be considered necessary.

An elliptical plate 83 fixed on the boss of the sprocket wheel 41 carries two pins 84 with pawls 85 (see Figs. 11 and 13) engaging the ratchet wheel 80. These pawls are held in light engagement by one C-shaped spring 86, (Fig. 11).

The ratchet wheel 81 is engaged by two pawls 87 carried on one pillar 88 projecting from the wall of the case, held in light engagement by the letter C spring 89.

It is not essential to have two pawls 85 or 87, but preferable.

The pawls 85 are positioned to engage the ratchet wheel 80 to wind the screen on to the roller and the pawls 87 to allow the ratchet wheel 81 to turn only in that direction.

With the sprocket wheels 39 and 41 proportioned to revolve the winding rollers 16 and 17 a little faster than the fastest speed required to roll the screen, and referring to whichever of the two winding rollers is winding at the time. the sprocket wheel 41 engages and revolves the ratchet wheel 80 carrying with it the ratchet wheel 81 which is free to turn in that direction and the roller is turned by the friction between the wheel 80 and the flange 76 plus the friction between the wheel 81 and the flange 78. with as much slipping as is needed as the screen is wound in taut against the resistances on the positioning barrel and in the other roller.

Referring to the other roller with the screen leaving it the sprocket wheel 41 turning faster can not turn the roller as the pawls 85 do not engage the ratchet wheel 80 in this direction, the roller turns only to allow the screen to be drawn off it by the positioning barrel and the other roller winding in, and the screen is kept taut by the friction between the flange 78 fixed on the shaft and the ratchet wheel 81 which is not free to turn in this direction and as the other ratchet wheel 80 cannot turn without the wheel 81 there is also the friction between the flange 76 and the wheel 80 to be overcome.

Thus. whenever the positioning barrel 18 with the driving sprocket wheel 39 is set in motion by the intermittent drive from the rollers 37 on the continuously moving motor driven chain 30 engaging periodically with the sprocket wheel 36 of the positioning barrel. always one of the winding rollers 16 and 17, according to the direction of motion of the chain 40, is engaged frictionally pulling in the screen 15 stretched taut against fri'tion resisting the unwinding of the other roller, until such time as the switch 62 is struck over by the lug 61 to reverse the motor, when, with reversal of the motion of the chain 40, the other roller instead takes up the winding,.the first roller now releasing the screen with friction resistance, whenever the chain a is set in motion.

And the effective values of the friction grips opposed in pulling in and holding back the screen are variable with the changing radius of the roll. and the one greater with the other less and vice versa, and the roller winding and nearly full may not pull sufiiciently upon the screen to draw it off the other roller nearly empty, and the winding speed increases as the roller winding fills. and these variations are diminished with larger diameters given the winding rollers 16 and 17 and provided against altogether by the positioning barrel 18.

For the screen pulling too weakly or too slowly, over the barrel 18' is assisted in transit, or pulling too strongly or too quickly is hindered, by friction with the barrel which revolves at a constant and correct rate, and by engagement with the teeth 19 in the perforations 20, by which the speed of the moving screen and its exact stopping positions are finally and exactly determined.

A circular roller 90 (Figs. and 6) carried fixed on the shaft 31 in the gear between the pinion on the motor 26 and the driving sprocket- 29 is of non-conducting material provided to carry metal contacts 9O insulated as may be required to make and break as the shaft revolves circuits in any ystem of lighting or other electrically operated display contrived and added to attract and hold the attention of the public to the advertising performed with this invention.

A spur wheel 91 (Figs. 11) fast on the boss of the sprocket wheel 39 engages with a spur wheel 92 fast on a sleeve 93 carried on a shaft 9% projected" from the boss 51 on the plate carrying the bearing 23. This sleeve, which is retained by washer and split pin 95 has fixed on it another spur wheel 96 engaging with a spur wheel 97 free to turn on the shoulder 54 on the plate 50 concentric with. the positioning barrel shaft, and retained on the shoulder 5 1 by means such as the flanged collar 98 between it and the boss of the sprocket wheel 39.

The wheel 97 car ies a ring 99 of nonconducting material, to carry metal contacts 99 insulated as may be required to make and break, as the ring revolves, certain circuits in the auxiliary display service, varying it in any way desired in the interval with the screen in motion between each advertisement display, to break the monotony of a continuous unaltering auxiliary display, however arresting, and introduce new effects calculated to hold the attention.

In operation with this invention, and assuming a suitable screen provided, properly perforated for the positioning teeth 19 on the barrel 18, with the tapered ends and spare lengths desirable to facilitate the installation of the screen as well as for good anchorage to the roller, and the advertisements or announcements properly depicted and correctly placed on the screen, and the screen brought to the, apparatus for its insertion in its place wound ready on one of the winding rollers for conve ient carriage, the lower roller 16 for preference, this roller having been taken out for this purpose preferably by slacking away only the bearing screw carrying the end shaft 68, would be established in its place again by the readjustment of that screw.

Then enough of the screen would be pulled out by hand to be guided by hand and passed over the rollers 24 and 18 and attached to and rolled sufficiently about the other winding roller, revolving this roller to gather in the loose screen by turning the positioning barrel by means of the winding handle provided for.

Still using the winding handle to move the positioning barrel this way and that and handling the screen and winding rollers as necessary or convenient certain marks provided on the positioning barrel and on the screen would now be manceu "red into position to insure the engagement of the teeth 19 on the positioning barrel in the. right position in the lines of perforation (Fig. 1) in the screen to bring all the advertisements or announcements in turn to their proper stationary position, these being of course spaced rightly on the screen for this purpose.

With this done, as it would be, with the driving chain 30 in such a position that the positioning barrel sprocket is not engaged by any of the driving rollers 37, or included between them, the apparatus for this invention is now ready for starting the motor 26 and for proper and continuous operation for as long as the driving current is maintained.

Stopping the motor at any time with the line of rollers 37 on the chain 30 clear of the sprocket wheel 36, the screen. 15 is shifted quickly to any new position to any extent, as for examination, to do anything to it or to wind it up for removal, just by revolving the positioning barrel with the winding handle provided for.

With the motor stopped and the line of rollers 37 clear of the sprocket wheel 36 it is obvious that the screen can be completely wound off on either of the rollers 16 17 simply by revolving the positioning barrel in the right direction by means of the windinn' handle.

The time allowed for each advertisement is determined by the rate of revolution of the chain 30, the time each advertisement is stationary depending on the relative length of the part of this chain not occupied by the rollers 37 which engage the sprocket 36 (Fig. 7).

The proper adjustment of the chain 60 in a position to strike over the motor reversing switch 62 with the lug 61 after the appearance of the end advertisement or" the series on the screen 15 is obtained simply by positioning this chain by hand.

Illumination of the screen at night is effected preferably by lamps 100 behind translucent shades inside the case 14 in a central position behind the screen 15 as shown in outline in Fig. 1 where the arrangement of the mechanism necessary in the invention affords space for their inclusion.

For an example of the purpose of the roller 90 (Fig. 5 and 6) mounted on a continuously revolving shatt, it there are lamps 101 (Fig. 1) provided, in two columns, one at each side of the screen as shown, the circuits for which are made dependent on electrical connection between metal contacts made good by metal segments on the said roller, mostarresting displays are obtainable, for day or night, such for instance as the lower lamps on one side and the upper lamps on the other lighting inomentarillv, in rapid alternation with a similar ett'ect in the other lamps in the columns; the circuits however kept sufliciently distinct from that for the lamps 100 which are provided for steady illumination showing up the advertisements on the screen and for night only.

And for an example of the purpose of the ring 99 (Fig. 10) geared to make one revohr tion while the positioning barrel is turning between two advertisements exposed. it the circuits for the lamps 101. but not that for the lamps 100, are made dependent on electrical connection between metal contacts against the ring 99 made good by a short metal segment in the face of this ring only coming into position at the end of the movement of the screen bringing an advertisement into position, the display with the lamps 101 is interrupted for practically the whole time the screen is in motion between two advertisements.

And in this interval with the regular display interrupted while the advertisements are changing. with the necessary cont-acts provided in the path of the metal segment in the ring 99 or of other segments provided in this ring, and the necessary connections made, other display with the lamps 100 is effected for the intervals between the advertisements such for instance as lighting these lamps momentarily in pairs, first the two bottom lamps, one on each side, then the two next above, and so on to the tops or". the

columns, and then down again in the same way, the display finishing with the bottom lamps.

Having now fully described and ascertained my invention and the manner in which it is to be performed I declare that what I'claim is 1. An advertising apparatus including a plurality of winding rollers, a strip containing advertising matter connected to said rollers and adapted to be wound and unwound upon the same, a positioning roller for moving said strip, a reversible prime mover driving said positioning roller, driving mechanism actuated by the positioning roller, friction clutches operated by said driving means and adapted to actuate said winding rollers, and automatic means for reversing said prime mover.

2. An advertising apparatus as claimed in claim 1 in which the positioning roller is driven from said reversible prime mover by means of sprocket wheels and a sprocket chain, said sprocket chain provided with means for causing the actuation of the prime mover reversing means.

3. An advertising apparatus as claimed in claim 1 in which the reversible prime mover actuates gearing, a driving gear actuated by said gearing, a driven gear rotated about the axis of the positioning" roller, a sprocket chain passing over the driving and driven gears, a toothed wheel fixed to revolve with the positioning roller, and lugs mounted on said sprocket chain and engageable with the toothed wheel for intermittently actuating said positioning roller.

4. An advertising apparatus as claimed in claim 1 in which the means for reversing said prime mover includes a switch, a sprocket chain provided with means for actuating said switch, and means for actuating said sprocket chain.

5. An advertising apparatus as claimed in claim 1 in which the means for reversing the prime mover includes a switch having an operating handle, a sprocket chain provided with means for actuating said handle, rollers tor actuating said chain, and means for driving said rollers from said prime mover.

6. An advertising apparatus as claimed in claim 1 in which. the friction clutches function to drive the winding roller which is winding and to exert a dragging action on the winding roller from which the strip is being unwound.

7. An apparatus as claimed in claim 1 including a contact roller driven by said prime mover and adapted to make and break an electric circuit associated with the apparatus.

Dated October, 1921.

CLIFFORD BARLOlV. 

